he was the chief of immigration and customs at the u.s. embassy in tokyo. >> we want to be a welcoming country in the united states, but certainly, we don't want the yakuza coming to the united states. >> because they're criminals? >> they have extensive criminal histories here in japan. they are members of criminal organizations. for both of those reasons, they would be ineligible to enter the united states. >> how did he get around that? according to jake adelstein's reporting, which we confirmed, tadamasa goto made a deal with the fbi. he offered to become a rat and inform on his yakuza brothers. >> goto said, "here's the deal. i need to get in the united states to get my liver transplant, or i'm gonna die. i will give you the names of all our front companies in the united states." so in terms of not only criminal intelligence but sort of, you know, pure, i don't know, covert intelligence, goto represented a real find for the fbi. >> so the fbi made this deal? >> and they gave him a special visa to come into the united states. >> gettin